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Table 3 Affinity for P uptake

From: Can differences in phosphorus uptake kinetics explain the distribution of cattail and sawgrass in the Florida Everglades?

Species

Oxygen

P

Vmax/K0.5

(l g-1DW h-1)

α

(l g-1DW h-1)

Cladium

High oxygen

Low

2.43 ± 0.40

0.75 ± 0.17

  

High

0.40 ± 0.22

0.28 ± 0.20

 

Low oxygen

Low

3.40 ± 0.27

1.44 ± 0.15

  

High

0.86 ± 0.20

0.32 ± 0.07

Typha

High oxygen

Low

2.51 ± 0.35

0.84 ± 0.14

  

High

1.63 ± 0.29

0.90 ± 0.25

 

Low oxygen

Low

7.25 ± 1.77

4.08 ± 0.50

  

High

1.17 ± 0.13

1.05 ± 0.34

  1. Average (± SE, n = 4-8) ratio between Vmax and K0.5 as estimated by the modified Michaelis-menten model (Vmax/K0.5) and the slope of the initial part of the uptake curve (α) as a measure of the affinity for P uptake of Cladium mariscus spp. jamaicense and Typha domingensis plants acclimated to low and high P level (5 and 500 μg P l-1) and to aerated and low oxygen conditions (8.0 and <0.5 mg O2 l-1) in hydroponic culture solutions